There is this great prospect presented and opened out in Ephesians 4. The ascended Lord gave gifts among men; He gave ministering gifts, apostles, prophets, and so on, for the perfecting, the building up of the body of Christ “till we all attain unto the unity of the faith, and of the knowledge of the Son of God”. It almost seems as though what is implied is this: that the goal of this body of Christ of which he is speaking, the Church which is His Body, is the full knowledge of the Son of God. Everything must be linked with that full knowledge of the Son of God.
Now, of course we understand this in a little way from our own spiritual experience and history. Every one of us who has any real spiritual life and history knows quite well that we owe our spiritual growth to spiritual knowledge that has come to us. We say: when I came to know (whatever it might be), when I came to know in a spiritual way, in a vital way, when I came to know that, it made all the difference. From the time I came to know in that way there has been a difference; I have been different, it has meant a great deal to me that I came to know! All the differences are made along that line of progressive, growing knowledge, spiritual knowledge, inward knowledge.
So the Word would reveal to us this: that all that God has intended in Christ for the saints, the great destiny, the great vocation, the great attainment — and what a calling it is, what an on-high calling, as Paul calls it — all that is to be reached by spiritual knowledge, by a progressively and continually coming to fresh inward knowledge. We can say: I know, I have come to know, and I am coming to know, and the Lord is leading me to know! It is like that, that is the way of it. That is simple, but I simply wanted at the outset to emphasize and remind you of the great value and importance that is bound up with spiritual knowledge.